Walking beam for oil wells and the like



Nov. 10, 1925- G. P. SLATER mums BEAM FOR on; WELLS AND THE LIKE FiledAug. 1924 Patented Nov. 10, 1925.

GUY I. SLATER, F T LSA-,oK LAHQMA.

WALKING BEAM non OIL wnnnsnlvn THE LIKE.

Application filed August 7, 1924. 7 Serial No. 730,742-- To all whom itmay concern:

Be it known that I, GUY P. Snarnn, a citizen of the United States ofAmerica, and resident of Tulsa, in the county oi Tulsa and State ofOklahoma, have invented certain new and useful Improvements in 7 WalkingBeams for 'Oil WVells and the like,"

of which the following is a specification.

This invention relates to machine elements and particularly to walkingbeams.

It is an object of this invention to produce a walking beam with partsassociated with it having a capacity for absorbing shocks andvibrations, due to the use of the walking beam in connection with pumpsfor oil wells and the like.

It is well known that walking beams for such use, especially in verydeep wells are subjected to considerable strain and it is an object ofthis invention to associate with the said walking beam, novel means forrelieving the apparatusand the pump from undue strainand vibration It isa further object of this invention to produce a walking beam having atruss or base extending from the center toward each end and to providenovel means for adjustably anchoring the truss in order thatcompensation maybe attained for taking'up lost motion and the like.

It is a further object of this invention to provide anchorages at theends of the beams for the pitman stirrup and temper screw and a centraltrunnion and coupling wherebythe trunnion is secured to the beam.

i Vith the foregoing and other objects in view, the invention consistsin the details of construction and in the arrangement and combination ofparts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, reference will be had to theaccompanying drawing forming ,part of this application, wherein likecharacters denote corresponding parts in the several views and in whichtFigure 1 illustrates a top plan view of a walking beam embodying theinvention; Figure 2 illustrates a side elevation thereof;

Figure 8 illustrates a view in elevation of a pitman stirrup;

Figure i illustrates an enlarged detail view of the end of the Walkingbeam on which the pitman stirrup is mounted; and

Figure illustrates a sectional View of,

the pitn an stirrup box. a

In these drawings, the beam is shown as being :tormed oi' a'plurality ofparts includ'- ing sides 10 and 11 comprising channel plates which. arein spaced relation to eachv other and the space therebetween is cov;

ered by a top plate 12 secured to the flanges of the channel plates byfastenings 13, such as rivets or the like.

. A bottom plate 1 L similar to the plate 12 I is secured tothe' bottomflanges of the channel plates. The top plate and bottom plate haveapertures 15 and 16on each side of the center of the beam through whichtruss rods 17 project, it beingv shown that eachtruss rod. extendsdiagonally through the beam from the top to bottom and that theadjoiningends oi the truss rods are connected by. a link 18, althoughother means may be resorted to for connecting the truss rods or, under.certain conditions, a continuous rod may be employed. The outer ends ofthreaded as at 19 to be engaged by nuts 20 in order that the tension ofthe truss rods may be increased or diminished to suit particularrequirements. The rods extend through blocks 21 that are secured to thebeam and each block has a diagonally disposed aperture 22 through whichan end of one of the truss rods extends. Preferably, the truss rods areheld in spacedrelation to the upper. plate of the beam by I- beams 23that extend across the top 'of'the beam and rest thereon. A trunnion 24for the truss rods are the I-beam, in the presentembodiment of theinvention, extends across the top of the I-beam in engagement therewithand it is drawn into engagement with the beam by clips or yokes 25comprising one or more U-shaped bolts whose looped portion or portionsembrace the trunnion and whose ends extend through a plate 26 hearingagainst the bottom plate of the beam. The parts are held in theassembled relation just described by fastenings 27 such as nuts whichare threaded on the bolts as shown.

The bearing 28 for the head'of the temper screw which is, of course, ofordinary construction, may be attached to the beam by fastenings 29 suchas rivets, bolts or the like and the opposite end of said beam is provided witha pitman strap hearing or box.

In the present embodiment of the inven- I tion the pitman strap has itslower end boX or bearing 33 that is secured in placeby' fastenings 34Lin the end by bolts, or the like, which bind the parts together as willpresently appear. I V V t The under surface of the bearing block 82 isrecessed to form a cavity 35 and depending side flanges 36 which embracea yieldable cushion 37 so as .w confine the said cushion in the cavitybetween the bottom of the bearing and a base block 38, preferably ofcast iron or the like, which rests on the upper surface of the beam. Thefastenings 3% preferably eXtend through the cushion and the baseblo'ckso that these are anchored to the beam with the bearing for thepitmanstrap as is quite well shown in Figure 5. The presence of the cushionwill permit certain yielding action of the bearing 32' according to theresiliency or yielding'character of the cushion and it will beunderstood that the cushion may be of increased or diminished thicknessand yielding properties, according to the requirements in practice as tothe" load that the beam must carry and the like. I

It will be seen from an inspection of the drawing that the flanges 26are of such depth as to embrace thecushion and pan tially the sides ofthe base block, but there ,is a clearance between the flanges and thebeam to permit movement of the bearing with relation to the base blockand beam. This relation of parts insures proper guid ing of the bearingand aids in retaining the parts in their assembled relation.

It will also be apparent from an inspection of the drawing that thetension of the trusses may be increased or diminished and that acomparatively strong beam may be constructed from material ofcomparatively light gage and changes of course may also be made in thedetails of construction without departing from the spirit of theinvention within the scope of the appended claims.

rods extend, and means on the outer ends of the truss rods for anchoringthe same to the lower plate of the walking beam.

2; A walking beam for Well drilling and pumping comprising side channelplates. a top plate and a bottom plate above and be low the flangessecured thereto, I-beams extending transversely of the top plate on eachside of the trunnion of the Walking beam, a yoke comprising U-shap'edbolts inverted with respect to the walking beamand having their endsprojecting through the top and bottom plates of the Walk-' ing beam, atrunnion resting on the upper plate of the walking beam and extendingtransversely thereof through the loop of the yoke whereby the trunnionis anchored on the Walking beam, truss rods supported on the I-beams'andhaving their ends connected together between the I- beams, the top andbottom plates of the walking beam having diagonally disposed aperturesthrough which the trussrods extend, and means on the outer ends of thetruss rods for anchoring the same to the lower plate of the walkingbeam.

